code: def _update_key(self):
      self._obj_set(
          "_key", tokenize(type(self).__name__, *self._values_)
      )
      return self
  
imports: from typing import Dict, Tuple, Type
  from ..serialization.serializables import Serializable, StringField
  from ..serialization.serializables.core import SerializableSerializer
  from ..utils import tokenize
label_desc: Use image node_id 7 for calling the Base obj's underlying member method code with example usage: obj._update_key() and returns: self